This section deals with direct variation, the answers for problems 1-5 are as follows:

1. The constant of variation is 2
y = 2x
2. The constant of variation is -3
y = -3x
3. y is not directly varying with the value of x
4. The constant of variation is 1/3
y = 1/3x
5. The constant of variation is 7
y = 7x
6. y is not directly variable to x
7. The constant of variation is -2
y = -2x